Three months remained for maize recovery, and in each month, the aboveground biomass accumulation of the intercropped maize was significantly improved compared to sole maize. In 2012, the aboveground biomass accumulation of intercropped maize in each recovery month was increased by an average of 7% under N0, 15% under N1, 14.0% under N2, and 13.8% under N3, compared with sole maize.